Stone polisher



June 24, 19.30.

C. S. .CUSHMAN STONE 'POLISHER Filed Jan. 6, 1927 2 Sheets-Sheet 2 6% 5. u/smaza/ Patented June 24, 1930 I v i i r i i UNITED STATE QWATE 'i i@E oHaizLuss. ous-amen, or :BABBE, VERMONT i I i i I v sronE ronrsrrna 7 Application filed January 6, Serial No. 159,457.

This invention relates to new and useful elevated track on which is supported. the improvements in polishing machines, and travelingcarriagell, said carriage being particularly to machines for polishing stone, adapted to support the elements forming the such invention being an improvement over subject-matter of the present application,

my prior Patent #1,491,790, issued April Mounted on each side of the carriage are 29, 1924. the vertically alined brackets 12, and .dis-' In the prior patent the motor was bolted posed vertically through each pair of said V to a ring, said ring being properly supbrackets is a tubular member 184, having the ported in a grooved ring within the casing. longitudinal slots 14, in the opposite sides,

10 The motor was provided with a gear which intermediate the brackets. The upper 6Q meshed with a ring gear on the casing, and bracket 12is provided with an apertured lug whereby the casing was rotated,'to rotate to which is connected one end of a spring the polishing element carried by the bottom 15. v 1 of the casing. he polishing unit includes a casing 16,

15 Also, the casing of the motorwas prohaving a ring gear 17 on its upper edge. 55 j vided with straps engaged with a bar, and lVithin the casing is disposed a grooved said barwas'mounted on a vcrticalsupport ring 18, and arranged within said ringis a for adjustment vertically thereon. runner ring 19; A flange 20, carried by the The present device contemplates a 'differside of the casing, bears on. a portion of the 20 cut, and more eflicient means of connecting upper face of the runner ring, whereby to 7Q' the motor to the ring, whereby the entire maintain the latter withinthe ring 18, and 7 device may be elevated or lowered with reagainst movement from the casing. 011 the spect to the hanger of the device. 1 inner portion of the upper face of the ring Another object is to provide a device of 19 is secured a second ring 21, and connected this character which is capable of being with and extendingupwardly from the ring 175 readily removed, and another device for 21 is a yoke 22, havinga socket 23 in its polishing a stone substituted therefor. upperv end. Disposed within the casing and A still further object is to provide a dehaving securing lugs 24', is a motor 25, such vice of this character wherein a plurality lugs resting on. the ring 21, and being bolted,

ofstone polishing elements may be suptogether with the ring 21, to the ring 19. 3Q

ported on the same carriage, thus permitting On the motor shaft is a gear 25? which difierent parts of the surface of a large stone meshes with the vring gear 17. Secured; I to be polished at thesame time, or to permit within. the socket 23 is the lower end of a woiik on several piecesof stone simultanevertical hollow shaft or rod 26, the upper ous y. I f l v I Other objects and'advantages will be apthrough the before-mentioned tubular memparent from the following description when her 13, and being provided with a transverse taken in connection with the. accompanying pin 27, carrying rollers 28, which play 111 the drawing. 1 1 slots 14, of the tubular member 13. V 40 In the drawing: i J Secured to the bottom of'the casing 16 is to Figure l is a front elevation of the stone a casting 29, which'has the downwardly eX- polishing device. r i tending yoke 30, the arms of which are .Figure 2 is a side elevation of the same, pivotally connected with a block 31p1votally partly in section. i carried by the stone wheel carrier 32, where portion or the rod being slidably disposedpg I if Figure 3 is a horizontal sectional view on by said stone wheel is readily capable of 9-5 the line 33 of Figure 1. j adjusting itself to various unevennesses on Figure 4 is avertical sectional view on the the surface of the stone being polished, due 1 line 4-4 of Figure 1. i v to the fact that said casting is a portion of Referring particularly to the accompanythe universal joint which includes'the said ing'drawing, 10 represents a portion of an block.

, 7 On the yoke 22, adjacent the'socket 23, is

' an apertured lug 33, to which is, connected ,one end of achain. 34, the other end of the chain being connected to the other end of: the spring 15, and whereby the casing, containing the motor, together with the stone wheel, may be maintainedin proper contact withthe stone when noving over uneven places onthe surface of the stone;

When it is desired to replace the polishing unit with another unit of'greater' or lesser size,0r a unit of different abrasive qualities, the operator removes the pin 27, to lower the stone polishing unit, and permit the rod 26 to slide downwardly out of the tubular member 13. The hoist is disconnected from the polishing unit, and connected 'to the unit which is to be substituted, after which the new unit is elevated intoplace, and the pin- 2? replaced through the slots of the member 13, and the rod 26, of the substituted unit.

t will be noted that the rod 26 is provided with a, series of opening 27, i for interchangeably receiving the 11127, whereby to permit the polishing unit being supported at the desired height. VWhen a small polish ing wheel was used in a device of this chara-cter, heretofore, the polishing unit, include ing the motor, became quite top-heavy, or

i overbalanced. This was beceuseot the more or less flexible support for the unit. Tl'io particular'mzinner in whichthe present devibe is constructed provides for holding, the polishingunit in arigid upri ht position, ijthereby overcoming any tendency of such unit removedlatterly, due to the light weight. of the small polishing wheel.

*VVhat is claimedis:

A "polishing device including a horizontally movable carriage, vertically alined guides on'the carriage, a vertical tubular member extending between the guides and having its ends secured therein, said tubular member having longitudinal slots in "opposite sides thereof between the guides, a

polishing wheel, a motorior driving the wheel including a casing, a vertical sh'ait tached to the casing and slidably disposed through said tubular member, and a trans-- jverse pin removably disposed through the shaft and having its ends provided with rollers disposed in saidslots to maintain the motor operated unit in a rigid upright posi- 7 tion, whereby to prevent overbelancing thereof when a small polishing wheel is used; s r

f In testimony whereof, I afiix my signature.

CHARLES S. CUSHMAN 

